Printing through the preview pane, however, does seem to do the trick. Printing straight from the OutJob never seems to work for me and I get exactly what you did (a print that doesn't match the PCB dimensions). IT IS TELLING YOU THERE MAY BE COMPATIBILITY ISSUES IF YOU TRY TO OPEN THE PCB DOCUMENT IN AN OLDER VERSION OF ALTIUM. Instead of clicking 'Close' or 'Print', click 'Preview', and then click 'Print' from within the 'Preview' window.If you select it (click on it) you see 'change' and 'remove' in the top right corner of the selection. Up to this point I'm guessing you probably already did all this, but here's the difference: 1) The PDF output page size and orintation In the output job, on the right-hand side you have the PDF 'output container'. Select your paper size, orientation, and under 'Scaling' change the dropdown to 'Scaled Print'.Right-click the 'PCB Prints' line again and this time click 'Page Setup'.Right-click the 'PCB Prints' line that just appeared and select 'Configure' to set up which layers you want to print (I'm assuming you already know how to do this).Under 'Documentation Outputs' click 'Add New Documentation Output' and select 'PCB Prints' -> ''.If you haven't already, add an OutJob file to your project by right-clicking it in the Projects pane, selecting 'Add New To Project', and choosing 'Output Job File'.I discovered that the most reliable method for me was to print through the 'Preview' panel within the OutJob. I have had this problem a number of times.

Altium schematic to pdf